NO. 2134. NOTES ON CHRYSODOMUS—DALL. 229 



close-set; this alternation contini es over the shell, but is less con- 

 spicuous on the last whorl; aperture seniilunate, livid brown within, 

 pinched to a notch by the sutural constriction; outer lip somewhat 

 thickened, not reflected, Urate within (with about 15 lirae) ; inner 

 lip with a thin coating of brownish enamel and three sharp sub- 

 sutural lirae in the adult, close to the subsutural notch ; pillar nearly 

 straight, canal narrow, strongly recurved, short, with a very con- 

 spicuous flaring siphonal fasciole, with a chink between it and the 

 reflected enamel of the inner lip ; opercuhuii small for the size of the 

 aperture, brownish, with apical nucleus. Length of shell 44; of last 

 whorl 29; of aperture and canal 19, of operculum 7.5; maximum 

 diameter of last whorl 17.5 mm. 



Habitat. — Fusan, Korea. Hirase collection. Cotype, U. S. Nat. 

 Mus., Cat. No. 247072. 



This shell belongs to the group of C. dims Eeeve {ineisus Gould), 

 of the west coast of America, and which includes " Euthna " viridula 

 Dunker ( ? ferrea Reeve) of Japan. The probabilities are against 

 the identification of the northern group, which has received the name 

 of Searlesia from Harmer, with the Magellanic Euthria typified by 

 E. ijluinbea; so I have accepted Harmer's name for a group which 

 appears to be largely represented by species in the North Atlantic 

 Pliocene, and in regard to the generic affinities of which very diverse 

 opinions have been expressed. 



ANCISTROLEPIS LATUS, new species. 



Shell large, solid, pale orange color under the (lost) periostracum, 

 with two nuclear and five subsequent whorls rapidly enlarging; nu- 

 clear whorls beginning with a minute apex followed by two rounded, 

 smooth, inflated, equal whorls with a deeply constricted suture form- 

 ing a subcylindrical apex to the mature shell; later whorls with a 

 wide and deep channel in front of the suture bounded in front by a 

 sharp thin elevated keel ; the remainder of the surface with numerous, 

 obsolete flat spiral ridges which are larger and more perceptible on the 

 base of the last whorl, where (in the type) six may be discerned, with 

 narrower interspaces; axial sculpture of rather rude incremental 

 lines ; aperture wide, notched at the end of the keel ; outer lip sharp, 

 rounded ; inner lip with a smooth continuous callus, its edge slightly 

 raised ; canal very short and wide ; siphonal fasciole well marked ; in- 

 terior of the aperture orange and white, concentrically zoned. Length 

 of shell 100; of last whorl 75; of aperture 57; maximum width of 

 shell 70 mm. 



Habitat. — Quelpart Island, south of Korea. Hirase. Type in 

 Hirase collection. 



This species is wider with a wider presutural channel and more 

 elevated keel than A. ma gnus Dall, to which it is of described spe- 



